I've used a couple places recently, but have the most experience with Action Machine in Shoreline. Rob has been there as long as I've lived in WA (about 40 years) and has always been helpful. He also builds race motors as I ran into him up at the drags one time I went.

Most recently I (along with Smithkid AKA Gene) built a 351 motor machined by a shop in south Everett. Name eludes me at the moment, but it's right about 212th and Hwy 99 in Everett.

Comparing these two shops is like night and day (AM is a pristine shop and the other is... well, not) but the work I saw from both was very good.

I've decided to go with Randy over at Johnson's Machine & Performance. After many conversations, I get the warm fuzzy feeling. Nothing but praise in regards to online reviews. Seems to be very knowledgeable and is experienced with the 331/347. Going to swing their shop today to finalize the specs and start the build.